[gtk/wip/matthiasc/popup5] window: Implement surface getter

[Matthias Clasen <matthiasc src gnome org>]

commit 9ac93b1a080f219e6805330c88c88f134e704f3e
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri May 17 20:37:52 2019 +0000

    window: Implement surface getter

 gtk/gtkwindow.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index ad37ab393e..ac84c49e50 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -280,6 +280,7 @@ typedef struct
 
   GtkCssNode *decoration_node;
 
+  GdkSurface  *surface;
   GskRenderer *renderer;
 
   GList *foci;
@@ -2376,6 +2377,15 @@ gtk_window_root_interface_init (GtkRootInterface *iface)
   iface->get_display = gtk_window_root_get_display;
 }
 
+static GdkSurface *
+gtk_window_native_get_surface (GtkNative *native)
+{
+  GtkWindow *self = GTK_WINDOW (native);
+  GtkWindowPrivate *priv = gtk_window_get_instance_private (self);
+
+  return priv->surface;
+}
+
 static GskRenderer *
 gtk_window_native_get_renderer (GtkNative *native)
 {
@@ -2412,6 +2422,7 @@ gtk_window_native_check_resize (GtkNative *native)
 static void
 gtk_window_native_interface_init (GtkNativeInterface *iface)
 {
+  iface->get_surface = gtk_window_native_get_surface;
   iface->get_renderer = gtk_window_native_get_renderer;
   iface->get_surface_transform = gtk_window_native_get_surface_transform;
   iface->check_resize = gtk_window_native_check_resize;
@@ -5687,6 +5698,8 @@ gtk_window_realize (GtkWidget *widget)
         }
     }
 
+  priv->surface = surface;
+
   gtk_widget_set_surface (widget, surface);
   gdk_surface_set_widget (surface, widget);